Hello, and welcome to my tutorial. In this thread, I'll be displaying a method of modification that does not appear to be widely utilized in the modding scene; Considering I've been away from this scene for so long, I wouldn't be surprised if this method is severely outdated, but hopefully the information is useful regardless.
UPDATE - July 5th, 2025:
I've slightly restructured and amended the guide a bit as well as added more information along with fixing up some typos. A huge thank you to Lilyzavoqth for providing info on editing texture indexes!
Also, for anyone that...
But some of the linked utilities couldn't be found, like the PRS file decompressor.